This sentence came in a passage about someone moved to a new place.We can't proofread or correct entire sentences here, but if you will tell us which word or phrase you think might be a problem, and provide context that explains what you want your sentence to mean, we will try to help.
Tom moved to the city and in the beginning he wasn't used to it because it was too busy and crowded but now he isn't any more. He is enjoying the life there.Without context, it makes no sense whatsoever.
No, "he isn't any more" can't be the opposite or negation of "He wasn't used to it." The opposite of that would be "...but now he is."I was wondering about the last part
(....but he isn't any more ) is it considered correct since it refers to the opposite of the first part ( wasn't used to it)